<span>The most electronegative atoms typically present in biological molecules are O and N.
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There is an emphasis on 3:1 ratios when learning genetics because they represent an important case by illustrating the impact of dominant-recessive relationships between alleles on mating outcomes.
The F2 generation produced a 3:1 ratio where the dominant trait is present three times as compared to the recessive trait. Mendel used two terms to describe the relationship of the two phenotypes based on F1 and F2 phenotypes. The hereditary determinants are of specific nature. In 3:1 ratios , there are three progeny with the dominant phenotype for every one with the recessive phenotype
This implies that three offspring will have a dominant phenotype and there is one offspring that will have a recessive genotype, that is the recessive phenotype. Hence, the overall ratio of dominant to recessive phenotypes is 3:1.
To know more about Mendel's law, refer
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